Appliance Thermostat

Appliance Thermostats


Stove and refrigerator Thermostats

Thermostats are nothing more than a on/off switch with a intelligence which can control a predetermined  temperature for Appliances like Refrigerators, Ovens, Microwaves, washing machines, tumble dryers and even GHD's has it.

Most people tend to think that a thermostat works the same as a water-tap; -

If you turn the thermostat setting higher more coldness or heat will flow.

Nothing can be more further from the truth

Refrigerator compressor and stove elements only work at 100% capacity - circulating refrigerant (gas) at full speed. The same with a oven element it only works full blast.

Once electric power is connected to a heating element it will go red-red hot till you cut the electricity by using a on/off switch(wall plug) or regulator( stove plate switch) and lastly a thermostat. Same with a compressor it only pumps gas full speed.
so you see there is no such thing as heating element or compressor operating on a slower
speed.
Appliance Thermostats

There are so many thermostat variouses on the market but I will just cover some of the more popular types we use in repairing everyday appliances.

I just need to get this out of the way first, a stove plate/element regulator (switch) is not a thermostat but I will tell more about them in another post.

Electronic temperature Probe for refrigerator


Kinds of thermostats

  • Mechanical thermostat; Used in Refrigerators and Ovens
  • Electronic thermostat(module); Fridges like Defy has them and the new generation ovens of samsung and whirlpool
  • Thermistor; used in GHD's, toaster, irons and kettles

Appliance thermostat Anatomy

  • Capillary; A Thin tub filled with gas which reacts with temperature changes 
  • Sensor probe: Attached to one end of the capillary tub one and connected to the unit you want to control.
  • Controller; Other end of capillary is connected to controls and the knob has number on it giving you the impression that you are increasing or decreasing "something" . . 
Well I hope this has given you something to think about and next time when you refrigerator over-ice or the oven over-tan the pie don't just assume that it is the thermostat that has gone on the blink.

Should you need more information write me an email.

Regards
083 52 52 522